+1
I agree with everything you have noticed SatKartr. I experimented also with the DV and DE on my Denon and noticed the same things that you have, a subtle muffling of of the sound. I can't put into words what my experiences were but what you say really makes sense to me. Some people may not notice this effect!
Maybe later on when I feel like experimenting again I'll give both a shot, but right now I've got DV and DE OFF.
Mel N.

My system